COMMON GREEN MOULD. 



FIG. 1. Showing 



Dichotoinously branched hypha (Gr. dichotumia, a division into two parts) subdivided by septa. 



Granular vacuolated protoplasm in the cells. 



Aerial hypha, branching at its ends like a brush or pencil, hence the name Penicillium. 



The terminal branches, corresponding to the hairs of the brush, breaking up into stylo-conidia 



(Gr. stulos, a stalk; lionis, dust). 

 FIG. 2. THE CONIDIA. Showing 



Size Jj5 inch in diameter. 

 Form Spherical. 



I Wall. 

 Structure 4 Protoplasm. 



( Vacuole. 

 Germination 



$ b. Eminence formed at one point of the conidium. 



c. Eminences formed at two points. 



d, e, fy f. Elongation and subdivision of the eminences by septa. 



Note. The ultimate result of the growth of the conidium is to produce a Penicillium like that in fig. 1. 



FIG. 3. Showing the SEXUAL PROCESS 



This has quite recently been made out, and occurs under peculiar conditions, as yet attained 

 only by artificial means. The male element or antheridium (Gr. antJws, a flower ; eidos, form) 

 is a short branch of a hypha, the female element or carpogonium (Gr. carpos, fruit ; gone, seed) 

 also a short branch coiled like a cork-screw. These two elements come together and exercise on 

 one another some reciprocal influence. A sexual process of this kind, where the conjugating 

 elements are different, is called Fertilization. As the result of fertilization a fruit or sporocarp 

 is produced, like a little pin-head. That fruit consists of an outer mass of sterile hyphaj 

 enclosing a mass of fertile hyphse. These fertile hyphoe are developed from the female element. 



FIG. 4. SECTION OP SPOROCARP (Gr. spora, a seed ; carpos, fruit) or FEUIT 

 Sterile tissue. 

 Fertile tissue in centre (red). 



FIG. 5. PORTION OP FERTILE TISSUE REMOVED FROM SPOROCARP. Showing 

 . Asci or cells containing spores (Gr. askos, a bag). 

 b. An ascospore removed from an ascus. 



FIG. 6. Showing GERMINATION OP ASCOSPORE. 



CLASSIFICATION OF PENICILLIUM, 



Kingdom Plan tee. 



Su b-Kingdom Thallophy ta, 



Class Carposporere, because it possesses a sporocarp. 



Group -Fungi. 



Order Ascomycetes, because of the asci. 



Genus Penicillium (L. penicillum, a painter's brush). 



Common Name Green Mould. 



